User's Manual

ProgrammingChapter —7
286 700 Series Color Mob ile Computer User’s Manual
Notifications
Use the following information to programmatically control the vibrator, to
write an application to turn on the vibrator when a message is received v ia
the WLAN radio link, and turn it off when the user hits a key.
Vibrator support is implemented in the NLED driver as a false LED. The
vibrator is LED 5 and is identified with an CycleAdjust of –1. The v ibr ate
option is only available in the notifications panel when the vibrator is pres-
ent in the system.
Regarding an applications interface to NLED.DLL, LEDs must be avail-
able f or use by applications. This is possible via two fu nctions exported by
the COREDLL.DLL file. To use the LED functions, declare these as ex-
tern ”C” as follows:
extern ”C” BOOL WINAPI NLEDGetDeviceInfo(UINT nInfoId,
void *pOutput);
extern ”C” BOOL WINAPI NLEDSetDevice( UINT nDeviceId, void
*pInput);
The LEDs are enumerated f or access through the data structures associated
with these APIs:
S Notification LED 0
S Radio On LED 1 (does not apply to the 730 Computer)
S Alpha Lock LED 2
S Scanner LED 3
S Low Battery 4
S Vibrator 5 (does not apply to the 730 Computer)